Improvement in scaffoldings



JAMES D. PETTIT.

Improvement in Scaffolding.

Patented April 25, 871.

ident hm vJAMES D. PETTIT, OF ROCHESTER, INDIANA.

Letters Patent No. 114,034, dated April 25, 187.1.

IMPROVEMENT lN SCAFFOLDINGS.

The Schedule referred to in these 'Letters Patent and making part' ofthe same.

To all whom it may concern Be it known that I, J AMES D. PETTIT, ofRochester, in the county ot' Fulton and State of Indiana, haveinvented anew and useful Improvement in Adjustable Scatfold Benches; and, I dohereby' declare that the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art tomake'and use the same, reference being had to the accompanying drawingforming part of this speciiication.

The principle of my invention consists in making bench-pieces, braces,and legs independently movable, so as thereby to atford an adjustment inlengthor height at the same time, or separately, as convenience maydictate.

1n the accompanying drawing-z Figure l represents aside elevation of ascaffoldg bench constructed according to my invention.

Figure 2 is an end view, partly in section, as onthe line :v a; of tig.l.

Similar letters of reference indicate correspondingarts.

This scaffold-bench consists of the horizontal benehpiece A, legs B, andbraces C. The bench-piece A consists of two parts, each of which isslotted. D represents the slots which allow the pieces to be slipped ineither direction forincreasing or diminishing the length of bench.

E represesents angulajj or curved metallic plates on the ends of thelegs B, by means of which the legs are attached to the bench, as seen intig. 2.

F are the bolts by which the legs are attached, which bolts pass throughthe slots D. When the nuts are loosened .these bolts will slide in theslots freely in either direction.

G'- iS the slot in the legs, and

H is the slot in the brace's.

l, the bolts by which the legs and the braces are fastened together.

The braces are connected with the bench by metallic. bolts L, which passthrough the plates J and slots D. As seen in iig. 2 the legs are' thrownlout from the bench by the angular p1ates.E,-while the plates J on thebraces are straight. By this arrangement the legs are thrown apart whenattached to the bench, as seen in iig. 2, so that the bench will'beself-supporting ou the floor.

All (or a portion) of the bolts may be provided with lever-nuts, as seenat K, for more readily adjusting the scaffold to any desired position.

The two parts of which the bench-piece A is composed are held togetherby the bolts L F, which connect the braces O and legs B, the nuts ofwhich bolts are loosened when the length of the bench is altered, asthose bolts pass through the slots D and slidethereiu.-

It will be -seen that, by loosening the nuts on the fastening-bolts Iand' E, the legs B maybe placed at any desired angle with the bench andthe bench raised or lowered thereby, and thatby loosening the bolts Lthe bench itself may be increased or diminished in length,

Two or more of these benches may be used for building a scaffold, boardsor planks being laid on the' boliches in the ordinary manner.

Having thus described my invention,

I claim as new and desire to secure by Letters Patentlhe slotted legs BE G, movable in the slots D D, and the slotted sliding pieces which formtop A, combined as described, with adjustable bracesA C for the purposeof adjusting the height by a greater'or lesser Obliquity of the legs,and the length by drawing out the top-pieces.-

. J AMES D. PETTIT. Witnesses:

J As. Ln R01 Boo'rH, FREDRICK PETISG.

